Grabber's Adhesive Body Warmer is "the portable heating pad you can wear"! It provides soothing comfort for minor aches and pains, as well as extended everyday warmth during outdoor sporting activities. Simply stick your Adhesive Body Warmer to an inner layer of clothing to enjoy over 12 hours of heat._____________________________________________________________________Ready to useAir activatedSafe, natural heatHeats up 15-30 minutes after openingSafe to dispose of with regular garbage; ingredients will not harm the environment40 pair of warmers per displayTSA approved_____________________________________________________________________Duration: 10 Hours (actual duration depends on usage and storage conditions)Weight: 0.13 lbs (59 g)Dimensions: 4.63" x 6" (11.8 cm x 15.3 cm)Average Temperature: 135 F (57 C)Maximum Temperature: 158 F (70 C)Ingredients: Iron, water, cellulose, activated carbon and saltCountry of Origin: USA